Pneumatic riveter.



Patented Mar-fu,- |902..

2 Sheets-Shxraet L No. 695,4I5. v

C. B. RICHARDS. PNEUMATIC RIVETEB.

(Application Bled Dec. 19, 1900.) (No Model.)l

Sfr. f l' .N -mh Y` Patan'ted Mar. ||,"|sm2.` (LAB. RICHARDS. A PNE-UMATlC HIVETER. (Application med me. 19, 1900.)

(No Model.)

2 Sheets-Sheet 2.

MRW

III y UNITEDV STATfE yA'IENT OFFICE.-

CI-IARLES R. RICHARDS,'OE CLEVELAND, OHIO, ASsIei,\IOR,-B V` DIRECT AND MEsNE ASSIGNMENTS, TO THE CLEVELAND PNEI-IMATIC TOOL COMPANY, OE CLEVELAND, OI-IIO, A CORPORATION OE OHIO, AND THEPHILADEL- PI-IIA PNEUMATIC TOOL COMPANY, OE PHILADELPHIA, PENNSYLVANIA, A CORPORATION OE PENNSYLVANIA.`

PNEUMATIC RIVETER.

,SPECIFICATION forming part of Letters Patent No. 695,415, dated March 11, 1902. Application iiled December 19, 1900. Serial No. 40,347. (No model.)

lIo contemplated applying that principle, so as to distinguish it from other inventions.

The annexed drawings and the'i'ollowing description set forth in detail one mechanical form embodying the invention, such detail '15 construction being but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings, Figure I represents an axial section of my improved yokezo riveter, showing the parts in position before starting the operation-of the riveter; Fig. II, an axial section of the riveter, showing the parts in position for operation and the yoke being broken and part of the Same removed; z 5 Fig. III, an enlarged axial section of the rear end of the hammer; Fig. IV, a transverse section on the line IV IV in Fig. I and looking rearward; Fig. V, a similar section on the line V V in Fig.I looking rearward; Fig. VI, a 3o Section on the line VI VI in Fig. I looking forward; Fig. VII, a section On the line `VII lVII in Fig. I looking` forward; Fig. VIII, a longitudinal sectional detail View of the barrel and barrel-tube, illustrating the live-air channel to the forward end of the valve-piston chamber and therecess and port com Inunicating with said channel at the rear end of the barrel-tube; Fig. IX, a section on the li'ne IX IX in Fig. I, and Fig. X a section on the 4o line X X in Fig. II.

The yoke l of the riveter is of any suitable construction, beinghere illustrated as a flat arched Inetal plate or bar, but may be constructed in the form. of an arched truss or in I any other form suitable to the style of work in which the riveter is to be employed and to the `amount of strength required. The lower yder between the lips.

edge 2 of one leg of the yoke is formed with .n

ratchet-teeth and is clamped between twolips 3, projecting from a cylinder 4. p vThe lips arewhich pass clamping-bolts 6, .which pass through holes in the yoke-leg, securing the cylinder to the saine. A dog 7 engages the ratchet-teeth upon the edge of the-yoke-leg and Slides in a bore in the side of the cylin- A spring 8 forces the dog into engagement with lthe ratchet-teeth, and a pin 9 projects from the dog and out through a slot 10 for the purpose of manipulating the dog. The cylinder has an axial bore l1, the rear end of which has an annular v shoulder 12, internally rabbeted for a packing-ring 13, V-shaped in cross-Section. The forward end of the cylinder has a similar internally-rabbeted annular shoulderfformed by a ring 14, screwed into the end, and a similar packing-ring l5 is placed in the rabbet of said ring. A hammer-barrel 16 slides in the annular packed shoulders and has an annular piston 17, provided with a cup-packing 18,

sliding in the' cylinder-bore. A plug throttle- 1 valve 19 fits in a valve-casing 20,'tra'nsversely formed in a rearward projectionfroln the cyl- Inder to the rear of the lips, and Said Valvecasing hasan inlet-opening 2l communicating with a socket 22, into which a hose or tube for theactuating iiuid may bescrewed or other.-

wise Secured. A'distributing-channel 23 eX- tends from a port in the valve-casing to the rear end of the cylinder, and a distributingchannel 24 extends from a port in the valve. n

casing to the forward end of the cylinder. Au

exhaust-port 25 extends`from one end of the valve-casing. The valve has a handle 2G for manipulating it and is held to its seat by a spring 27, bearing against the handle end and f confined by a cap 2S, Screwed into the end of the valve-casing. The Valve has a fiat recess 29 in one sidewhich does not extend completely to the ends of the valve, and said recess is of suflicient Size to connect the inlet-opening and the rear distributing-port. A passage 30 extends from Said recess through 5o formed with longitudinal slots 5, through i the valve and may register with the forward distributing-port when the valve is turned to bring the recess out of connection with the forward distributing-port. A groove 3l or recess is formed in the side of the Valve, eX- tending the entire length of the same and may alternately register with the distributing-ports, registering with one port when live air is admitted to other port. Said recess is the exhaust-recess, as its end regis'- ters and communicates with the exhaust-port in the end of the Valve-casing. When the flat live-air recess is turned to connect the inletport with the rear distributing-port,the live air will pass to the rear end oflhe cylinder and drive the hammer-barrel forward,the air in the forward end of the cylinder passing through the forward distributing-channel and exhaust-- ing through the exhaust-recess and exhaustport. When the Valve is turned to bring the live-air passage in the valve to Aregister with the forward distributing port and channel, the live air will` pass through said channel and port to the forward end of `the cylinder and force the hammer-barrel rearward, the air to the rear of the pistonexhaustin g through the rear distributing channel and port and the exhaust-recess, which now registers with the forward port, and thence out at the eX- haust at the end of the valve-casing. The hammer-barrel has a cylindrical bore 32, a narrow and short bore 33 near the rear end, and a wide bore 31 at the rear end. A capsleeve 35 is screwed over the rear end of the barrel and has internal ratchet-teeth 36 at its forward end engaged by a dog 37, pivoted in the hammer-barrel. Said dog consists of an arm pivoted at one end, formed with a bulge at its outer edge projecting beyond the recess in which the dog is pivoted, and a toothed end 3S engaging the ratchet-teeth. A spring 39 bears against the dog and holds it in engagement with the ratchet. The dog may be disengaged by pressing inward against its bulged edge. A tubular valve-block 40 is fitted within the large rear bore in the breech of the hammer-barrel, and a cap 4l bears against the rear end of said valve-block and of the hammer-barrel and is held in place by the cap-sleeve. A barrel-tube 42 slides within the bore of the barrel and has the same interior diameter as the narrow bore of the barrel. A nosepiece 43 is screwed upon the outer end of the barrel, and a bolt 44 slides in the wall of the barrel to engage a hole in the inner end of said nosepiece and hold the latter from turning. The bolt has a spring 45,which forces it into the hole, and has a pin 4G projecting and sliding in a slot in the barrel, by means of which pin the bolt may be With drawn. The interior bore of the nosepiece is of a slightly-larger diameter than the bore of the barrel, and an annularenlargement47 or head upon the outer end of a contracted toolnose or tool-socket 48, formed at the outer end of the barrel-tube, slides in said bore. An annular stop is formed at the rear of the nosepiece-bore by a ring 49, secured against the end of the barrel. Aspring 50 is coiled around the contracted tool-socket and vbears against the head of the same and against the annular shoulder 49, forcing the barrel-tube and toolsocket forward. The shank of a` button-set 51 iits in the socket and is held by a springbolt 52, engaging a notch in the shank and sliding in the head of the tool-socket. The end of the spring-bolt projects into and has longitudinal playin a slot 53 in the nosepiece. The contracted tool-socket fits and slides in the annular shoulder. A plunger 54: slides within the barrel-tube, the contracted portion of the barrel-bore, and through a tubular valve 55 in the valve-block. Said plunger has a circumferential channel 5G at its forward end and a circumferential channel 57 at its rear end. A live-air-inlet channel 58 has its inlet-opening through the wall of the hammer-barrel immediately to the rear of the piston upon the same and extends l`ongitudinally through the wall of the barrel and Valve-block to an annular channel 59 in the front face of the cap against the valve-block. Said channel has an overhanging flange 60 from the center of the cap, which fiange has an annular series of holes G1. The tubular "Valve has a snug fit between the valve-block bore and said flange, so that it may cutoff or open communication between the live-air channel and the annular port formed by the holes in the flange when moved rearward or forward, respectively, as shown in Figs. Il land I. The interior of the valve-block has a narrow vannular port G1 immediately at ils rear end, `which port communicates with the inlet-channel. Adjoining said annular port is an annular port G2, which 'communicates with the forward end of the barrel-bore by `means of a distributing-channel 03, longitudinally extending through the wall of the .Valve-block and barrel from the annular port to near the forward end of the barrel. An annular port Get adjoius said latter port and has one or more exhaust-openings through the walls of the valve-block, barrel, and cap-sleeve. An annular chamber 6G is formed near the forward end of the Valve -block and has two permanently-open ports 07, one at each end. A live-air-distributing' channel GS leads from the forward end of thc chamber through the wall of the valveblock and barrel to a point toward the middle of the barrel, where it opens inward into the bore of the barrel. The barrel-tube is formed at that point with a longitudinal recess G0, which is of suflicient length to communicate with the port of said channel for the entire longitudinal play of the barrehtube, and said recess has a port '70 at its middle which opens into the interior of the tube. A similar live-air-d istrib u ting channel 7l leads from the rear end of the chamber to a point forward of the terminal of the last-mentioned channel, and the barrelftnbe has a longitu dinal recess '72 similar to the recess G0, regia IOO IIO

` edge against the shank, binding against the` ing an angularl inner edge, fits.

forced inward by a spring 8,6. -A button-set' 87 has its shank inserted into the socket and tering with the port of this latter channel and formed with a port 73 at` its middle opening into the interior of the tube forward of the port 70. A port 74 opens into the barrel-bore from the live-air-supply channel, and a longitudinal recess 75 in the exterior of the barrel-tube registers with said port for the entire longitudinal play of the barrelitube andhas a port 76 at its rear end into the interior of the tube and 'registering with the rear port 70 and a port 77 at -its forward end register'- ing with the forward port73. The barreltube has a port 78 at its forward end opening inward from the forward end of a longitudinal recess 79 in the exterior of the tube, which recess communicates for the entire longitudinal play of the barrel-tube with the'p'ort of the forward distributing-channel 63. The barreltube is kept from turning by means of the end of the spring-bolt, which holds the button-set, and which slides in the, slot 53 in the nosepiece, so `that the longitudinal recesses inthe exterior of the tube may be kept registering with their respective ports in the .bore of the barrel.l The tubular shell-valve 55 has playin the bore of the valve-block and has-its interior bore of the same diameter as the narrow bore of the barrel and the bore of the barrel-tube. circumferential channel S0 which will connect the live-air port and the port to the forward distributingfchannel when the `valve is thrown rearward to cut off the channel in the Y valve-block cap and which will connectsaid latter port andthe annular exhaust-port when the valve is thrown forward.A The Valve has an annular portithrough its middle formed by an annular series of holes ,81, which may register with the exhaust-port of the valve-blockj when the valve is thrown rearward. An annular piston 82 is formed upon the valve to play within the annular piston-chamber 66 in the; `valve-block. A toolsocket S3 is secured in the other leg of the yoke directly opposite to the hammer, and the inner end of said tool-socket has a segmental portion cut away at 84:, into which a correspondingly-shaped dog 85, hav- Said dog is is prevented from dropping out of the same by the dog, which will be tilted and jam its same if the button-set shouldstart sliding outward. The faces of thev button-sets are suitably reeessedto correspond to theshape of the head of the rivet and of the head to bexformed upon the rivet.` The holder-0n.

button-set cannot be removed from its socket by a straight pull upon the same, but can be removed by twisting it within the socket, and

thus releasing it from theengagement of the.

angular edge of the segmental dogl In practice the riveter is suitablysu pported or suspendedto be brought to the work, and the yokeis brought in position to straddle the v work, so aste bring the holder-on button- Said valve has an annular' in Fig. I of the'drawings, in which "a channel beam A and a plain b ar B are disclosedas placed together face to face to be rivetedtosgagainst the head of the rivet, as shown gether by a rivet C. The holder-on buttonh set is brought to bear' against the head of the rivet, holding it in the rivet-holes, vand airis As the,

and thebarrel-tnbe will be forced back against 85 As air is admitted into thecylthe spring.y

inder the air will pass from `the latter through I the inlet-channel and into the hammer, which will start operating, causingthereciprocat ing plunger to strike the end of the rivet, upsetting the same and forming the head. As the rivet is tightly held between the holder-011 driven back in its hole. As the end of-the rivet becomes upset and the head is formed 'the hammer button-set and-the barrel-tube will gradually move forward,following the lon'- gitudinal reduction of the rivet. `Thelive air entering through the inlet-channel will 'pass tothe rear of the hammer and willpass through button-set andthe beams clampedby the nosepiece of the hammer, the rivet cannot bev IOO the channel in the valve-'block cap, and the perforations in the flange of` the same back of the plunger driving the latter forward, as shown in Fig. I. When theplunger' arrives ICS at the forward end of the stroke, -it strikes Y the shank yof the button-set andirpsets the rivet. At the end of the forward stroke ofthe plunger the rear channel in the same brings ythe rear live-air port in the rear yportion of the barrel-tube and the rear port in the barrel` tube which communicates with the forward end of ythe valve-piston chamber into communication, causing the live air thus conf f `ducted to force the valve-piston and the valve rearward, closing the channel in the valveblock cap and bringing the annular channel in the valve lto register with the annular in-A let-port and the port communicating with the forward end of the barrel and lbarrel-tube, distributing the live air to that end to =drive the plunger back.A The rearward lthrow of the valve brings the annular exhaust-portinthe `same to register with the exhaust-port in the valve-block, so that the air behind the plunger may exhaust as the plunger moves back. Asthe exhaust-port of the valve is a distance from the end, the exhaustwill be cuto 'before the plunger arrives at the end of its back stroke, so that the plunger will be cushioned by the air inclosed at the rear end of the hammer. When the plunger arrives-at the 'end of its back stroke, the forwardzehannel 0f*- the plunger will bring the forward live-air the live air thus conducted to force the valvepiston and valve forward, opening the channel in the valve-block cap and bringing the port communicating with the forward end of the barrel and barrel-tube into communication through the annular channel in the valve with the exhaust-port. This will cause liveair inlet to the rear of the plunger and eX- haust at the front of the same, driving the plunger forward to deliver its blow upon the button-set, and thus upon the rivet. When the rivet has been fully upset and headed, the throttle-valve is turned to connect the forward end of the cylinder to the live air and the rear end to the exhaust, when the hammer is moved back away from the work, and the riveter may be placed in position upon another rivet, when the operation is repeated. The slotted lips and the bolts passing through the slots and through the leg of the yoke, together with the ratchet-teeth and dog, admit of the cylinder being adjusted at a greater or less distance from the holder-on, according to the thickness of the work which is to be straddled by the riveter, this adjustment being auxiliary to the adjustment afforded by the hammer sliding in the cylinder. As the work is tightly clamped between the nosepiece of the hammer and the holder-on before the hammer begins to upset the rivet, the rivet willnot be liable to be knocked out by the blows of the hammer, such as is liable to happen in greater or less degree if the buttonset of the hammer were directly opposed to act upon the rivet without the specific means outside of the button-set for holding the holder-on tightly against the head of the rivet. The nosepiece bearing against the work around and at the side of the rivet acts as a support and guide for the hammer, which will be equally useful in a hand-riveter without y .the yoke, as in a yoke-riveter, and this conv struction is made possible by the telescoping feature of the hammer-barrel, which permits the plunger-cylinder, with the tool-socket and button-set, to be contracted when first placed against the rivet and to expand and elongate as the rivet is upset, while the tool is tightly and squarely held against the work. The nosepiece may be more or less reduced or cut away and shaped to suit the positions in which the riveter is to be employed and the surface of the work against which it is to `bear to clamp the work between itself and the holder-on. The construction of the barrel-tube sliding in the barrel and having the longitudinal recesses which make permanent connections between the ports in the tube and the channels in the barrel provides for this telescopic contraction and expansion. The valve mechanism and the plunger are accessible without removing the hammer from the cylinder by removing the cap-slecve,

which closes the breech of the barrel and retains the partsin position. Thehammer may be removed from the cylinder by unscrewing the ring which forms the forward end of the cylinder and sliding the hammer out through the open end of the cylinder, the cap-sleeve having previously been removed. The barrel-sleeve and tool-socket are accessible by removing the nosepiece Other modes of applying the principle of my invention may be employed for the mode herein explained. Change may therefore be made as regards the mechanism thus disclosed, provided the 'principles of construction set forth respectively in the following claims are employed.

I therefore particularly point out and distinctly claim as my invention- 1. The combination of a suitably-supported cylinder having openings at both ends, a fluidactuated hammer having a sliding fit in the end openings ofpsaid cylinder and having a piston around it fitted to slide in the cylinder, and means for controlling admission and exhaust of the actuating fluid into and out of said cylinder, substantially as set forth.

2. The combination ofasuitably-supported cylinder,a Huid-actuated hammer within such cylinder and provided with a piston fitted to slide within the same, and means for admitting the actuating Iiuid into said cylinder at either side of the piston for moving the hammer in either direction, substantially as set forth.

3. The combination of a suitably-supported cylinder,a iiuid-aetuated hammer within such cylinder and provided with a piston fitted to slide Within the same, means for admitting the actuating fluid into said cylinder at either side of the piston for moving the hammer in either direction, and a connection for the actuating fluid from behind the piston to the hammer for admitting such fiuid to operate the hammer after the latter hasV been moved forward by admission of the fluid behind the piston, substantially as set forth.

4. Thecombination ofasuitably-supported cylinder, a duid-actuated hamm er within said cylinder and provided with a piston fitted to slide within the same and having a passage for the actuating fluid opening into the cylinder behind the piston, and means for controlling the admission of the actuating fluid,

into the cylinder ateither side of the piston for moving the hammer in either direction, substantially as set forth.

5. The combination ofasuitably-supported cylinder, a fluid-actuated hammer within such cylinder and provided with a piston 'fitted to slide within the same and having a passage for the actuating iiuid opening into the cylinder behind the piston, distributingpassages for the fluid to the ends of the cylinder, and a valve formed with live-air passages adapted to alternately register with either of said distributing passages and exhaust passage adapted to alternately register with thc live- IOO IIO

Within said barrel and having a tool-socket at its end and a distributing-port at said socket communicating with the corresponding distributing-portin the barrel, and a plunger reciprocating Within said barrel and tube, substantially as set forth.

.8. The combination with a fluid-actuated hammer-barrel having a distributing-port in its bore and a tube telescoping within said barrel and having a distributing-port and formed with a tool-socket at its outer end,

one of said elements having a longitudinal` recess formed at the distributing port and registering with the other port to form communication between said ports-at all parts of the telescoping play, of a plunger reciprocating within said barrel and tube, substantially as set forth.

9. The combination ofa fluid-actuated hammer-barrel provided with a nosepiece at its outer end adapted to bear against the surface Vof the `work to be acted upon, a tool-socket telescoping in the ou ter end of the barrel, and a plunger reciprocating in` said barrel, substantially as set forth.

lO. The combination of a fluid-actuated hammer-barrel provided witha nosepiece at its outer end adapted to bear against the surface of the work to be acted upon and having distributing-ports, a tube telescoping within said barrel and having a tool-socket at its end and a distributing-port at said socket communicating with the corresponding distributing-port in the barrel, and a plunger reciprocating within said barrel and tube, substantially as set forth'. j

ll. The combination of a yoke, a cylinder on one leg of said yoke, a holder-on on the other leg of the yoke and opposed to the cylinder, a fluid-actuated hammer fitted to slide within the cylinder and provided with a nosepiece upon its end adapted to bear against the Work in opposition to the holder-on, means for admitting the actuating fluid behind the `hammerto slide the same forward in the cylinder, and a tool'longitudinally movable Within the outer end of the hammer-barrel, substantially as set forth.

1,2-The combination of a yoke, a cylinder on one leg of said yoke, a holder-on on the other leg of the yoke and opposedto the cylinder, a barrel fitted tov slide within the cyl-l inder and provided witha nosepiece upon its end adapted to bear against th-e work in oppositionjo the holder-on, means for admitting the actuating fluid behind the barrel to slide thesame forward in the cylinder, a barrel-tube telescoping within the barrel and provided with a tool-socket at its outer end, a plunger reciprocating within said barrel-tube, and mansfordistributing the actuating fluid to reciprocate said plunger, substantially as set forth.

13. The combination of a fluid-actuated hammer-barrel having distributing-ports for the actuating fluid, a tube telescoping within said barrel and havinga tool-socket at' its outer end and formed with distributing-ports having permanent connection to the ports in the barrel through longitudinal recesses registering with the ports for the entire play of the tube, a valve controlling the admission and exhaust through the distributing-ports and controlled by such fluid through distributing-ports in the tube and barrel, and aplunger reciprocating Within the tube and barrel channels around it for admitting the actuating fluid to the lvalve and registering with ports forsaid fluid inthe tube, substantially as set forth. n,

"14a The combination of a hammer-barrel Vair-inlet channel extending rearward in its bore near its middle, a distributing-channel in the 'wall and having a port near the outer end, and two rearwardly-extendingvalve-con? trolling channels having ports near4 theimiddle vof the bore;`fa barrel-tube telescoping Within the bore of the-barrel and having a tool-socketat its ou ter end and provided with a port at its outer end opening into a longitudinal recess in the outer side registering longitudinal recess in its outer-side registering with the inlet-port and having a port into the tube at each end, and ports registering with said latter ports and opening into longiwith the ports of the rearwardly-extending valve-controlling channels; a valve-chamber having all of the channels extending intoit; a valve in said chamber controlling and controlled by said channels, and a plunger in the barrel-tube having two annular channels around it which will connect the live-air ports in the tube with the registering ports at the extremes of the throw of the plunger, substantially as set forth. Y v l5.. In a pneumatic hammer, the combination of a tubular valve-block having a liveair-inlet channel extending through its wall an annular live-air port nearthe rear end and communicating with the live-air channel and an adjoining annular distributingport Aand with an annular exhaust-port and an annular piston-chamber having permanently open exhaust-ports at its ends and controlled inlet-ports, a capagainst the rear end of the valve-block and formed with an annucenter formed withan annular inlet-port,` and wall and formed With a-'port openinginto the" with the distributing-port in the barrel, a"

tudinal recesses in the: outer` side registeringand provided with valve-controlling fluidc having an axial bore and provided withalive- IOC `and opening at its rear end and formedwith .l

lar inlet-channel and a'iiange around the a tubular valve having play within the chamber of the block and having its rear end sliding between the iiange and the block into the annular channel in the cap and formed with an annular distributing-channel near its rear end and with an annular series of exhaustholes at its middle and with a piston sliding in the piston-chamber, substantially as set forth.

1G. In a pneumatic hammer, the combination of a tubular valve-block, a cap bearing against the end et' said block and having an annular inlet-channel and an annular flange overhanging the channel from the center of the cap and formed with an annular port, and a tubular valve having its end sliding between the bore of the valve-block and thefiange into the channel, substantially as set forth.

17. The combination of a yoke having the edge of one leg formed with ratchet-teeth, a riveter-cylinder formed with longitudinallyslotted lips between which said leg fits, a dog engaging theratehet-teeth and movable in the bottom of the space between the lips, and fastening-bolts passed through the slots in the lips and the leg of the yoke, substantially as set forth.

1S. The combination of a tool-socket having a segmental slot, a segmental dog fitting in said slot and having an angularinner edge, a spring forcing said dog inward, and a tool having its shank inserted into the socket and engaged by the angular edge ot' the dog, substantially as set forth.

19. The combination of a casing, a yoke connected therewith, a pneumatic tool mounted in said casingk and means operated by fluid-pressure for moving said tool toward and away from the Work, substantially asset forth.

20. The combination of a cylinder, a hammer-barrel contained in said cylinder, a plungerin said barrel, 'and means for admitting fluid-pressure to opposite parts of said cylinder so as to move said barrel in either direction.

2l. The combination of a cylinder, a barrel in said cylinder and having differentialpressure areas, a plunger in said barrel, and means for admitting fluid-pressure to said diierential-pressure areas.

22. The combination of a cylinder, a barrel in said cylinder" and having differentialpressure areas, a plunger in said barrel, and means for admitting and exhausting ilnidpressure to said diierential-pressme areas.

23. The combination of a cylinder, a barrel within said cylinder provided with a piston on a suitable portion thereof, and means for admitting the actuating fluid into said cylinder at either side of said piston for moving the latter in either direction.

In testimony that I claim the foregoing to be my invention I have hereunto set my hand this 27th day of March, A. D. 1900.

CHARLES B. RICHARDS.

Witnesses:

WM. Sncnnn, MARGARET F. SECHER.

y Il is hereby certified that one of the assignees in Letters Pa tent No. 695,415, granted March l1, 1902, upon the application of Charles B. Richards, of Cleveland, Ohio, for an improvement in Pneumatic Riveters,A should have been described and speoied as The PLilaclelphia`\` Pneumatic Tool Company, of Philadelphia, Pennsylvania, a corporation of a corporation of Pennsylvania, Pennsylvania; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the-Patent Ofoe. I

Signed and sealed this 6th day of May, A. D., 1902.

[SEAL] F. I. ALLEN,

Commissioner of Patents.

Correction in Letters Patent No. 695,415.

New Jersey, instead of The Philadelphia Pneumatic Tool Company, Philadelphia, 

